高吸水性树脂的合成及性能研究

Study on Synthesis and Properties of High Water Absorbent Resin

以过硫酸铵-亚硫酸氢钠为引发剂,对淀粉接枝丙烯酸和丙烯酰胺共聚合反应进行了研究,制备耐盐性高吸水性树脂,在优化条件下,既单体(g)/淀粉(g)=3∶1,丙烯酸(g)/丙烯酰胺(g)=30%,引发剂用量=3 mL,单体中和度=80%,产物吸蒸馏水率为520 g/g,吸0.9%NaCl盐水倍率为121 g/g。土壤中水分蒸发实验表明,不同质量分数的高吸水树脂都有一定的抑制蒸发和保水作用,这种作用随树脂用量的加大而增强。

In this paper, the graft copolymerization of acrylic acid and acrylamide onto starch was studied with ammonium persulfatc - sodium bisulfate as initiator. The best technological parameters were determined, Under the optimum technological parameter, the ratio of monomer to starch was 3： 1, the ratio of acrylic acid to acrylamide was 30 %, the volume of initiator was 3 mL, neutralization value of acrylic acid was 80 %, the product can absorb distilled water 520 g/g., 0.9 % NaCl solution 121 g/g. The experiments of soll water evaporation showed that polymer reduced evaporation obviously, higher application amounts produced better effects.